Is Youtube for everyone

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As far as downloading, the vast majority of videos on YouTube have heavily compressed audio, usually 128-160 kbps.

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I use QuickTime Pro (on a Mac) to extract the AAC audio from YouTube videos.

 

Choose File>Export>Movie to MPEG-4.

 

Then under the Options tab, choose "None" for video and "Pass through" for audio.

 

Change the extension of the resulting .mp4 file to .m4a and you're good to go.

 

(An m4a file is basically an mp4 with just the audio layer.)